Can an Avalanche Hammer melee basic be upgraded by Ogremight Bruiser (Greater Style)

Question

The Ogremight Bruiser (Greater Style) [ddi] allows you to use some powers in place of a melee basic attack.

You can use a power associated with this feat in place of a melee basic attack when charging.

The Avalanche Hammer [ddi] works with a melee basic attack.

When you charge an enemy and hit with a melee basic attack using this weapon, the attack deals 1[W] extra damage.

Does the upgrade effect from the Ogremight mean the attack gets the extra 1[W] of damage ?

Answer 1

No

There are two relevant phrasings used when things are used like a basic attack.

Ogremight Bruiser says (emphasis mine):

You can use a power associated with this feat in place of a melee basic attack when charging.

By comparison, a warlock's Eldritch Blast says (emphasis mine):

This power counts as a ranged basic attack. When a power allows you to make a ranged basic attack, you can use this power.

Note the difference: Eldritch Blast is a basic attack, while an Ogremight Bruiser power is used instead of a basic attack.

Answer 2

Yes

The phrases, counts as and in place of are the same as far as the rules go, substitutions. The character builder supports this too, you'll find your basic attack bonuses will show up on your in place of power cards liked Wicked Strike, a fighter At-will